Sheath



FIG. 1 is a top, rear, right side perspective view of a sheath according to the present disclosure;

FIG. 2 is a front view of the sheath of FIG. 1;

FIG. 3 is a rear view of the sheath of FIG. 1;

FIG. 4 is a left side view of the sheath of FIG. 1;

FIG. 5 is a right side view of the sheath of FIG. 1;

FIG. 6 is a top view of the sheath of FIG. 1;

FIG. 7 is a bottom view of the sheath of FIG. 1; and,

FIG. 8 is a top, rear, right side perspective view of the sheath of FIG. 1.

The broken lines in the Figures illustrate portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a sheath, as shown and described. 